Question

我有两个表，一个是List表，这里是表的数据类型

create table List(
   CustNo Int,
   NoOverDue money,
   OverDue1 money,
   OverDue2 money,
   OverDue3 money,
   OverDue4 money
)

和一个表调用tablecost

create table tablecost(
    custno int,
    cost money,
    DueDate datetime,
    ListDate datetime
)

我的表中有太多数据，所以我创建了一些数据列，以便您更快地解决我的问题。

insert into tablecost values (1,100,'20130812','20130712')
insert into tablecost values (2,100,'20130612','20130712')
insert into tablecost values (3,100,'20130512','20130712') 
insert into tablecost values (4,100,'20130412','20130712') 
insert into tablecost values (5,100,'20130312','20130712') 
insert into tablecost values (6,100,'20130112','20130712')

目的是插入我的List表那个：

如果我的duedate没有结束，它将插入nooverdue。

如果在1到30天之间过期，它将插入到过期1。

如果在31到60天之间过期，它将插入到过期2。

如果在61到90天之间过期，它将插入到过期3中。

如果在91到120天之间逾期，它将插入逾期4。

这是我尝试查询的方法，它运行正常：

insert into List (CustNo, NoOverDue)
select CustNo,Cost from TableCost
where  DueDate > GetDate() 
and convert(varchar(8),ListDate,112) between '20130711' and '20130713'

insert into List (CustNo, OverDue1)
select CustNo,Cost from TableCost
where  DueDate between DateAdd(Day,-30,GetDate()) and DateAdd(Day,-1,GetDate()) 
and convert(varchar(8),ListDate,112) between '20130711' and '20130713'

insert into List (CustNo, OverDue2)
select CustNo,Cost from TableCost
where  DueDate between DateAdd(Day,-60,GetDate()) and DateAdd(Day,-31,GetDate())
and convert(varchar(8),ListDate,112) between '20130711' and '20130713'

insert into List (CustNo, OverDue3)
select CustNo,Cost from TableCost
where  DueDate between DateAdd(Day,-90,GetDate()) and DateAdd(Day,-61,GetDate()) 
and convert(varchar(8),ListDate,112) between '20130711' and '20130713'

insert into List (CustNo, OverDue4)
select CustNo,Cost from TableCost
where  DueDate between DateAdd(Day,-120,GetDate()) and DateAdd(Day,-91,GetDate()) 
and convert(varchar(8),ListDate,112) between '20130711' and '20130713'

这里是我的问题，是否有任何可行的方法来缩短或改进查询代码？似乎很长时间才将此查询插入此表中

Answer 1

我同意评论，您最好将数据的存储和演示需求分开。但是，如果您仍然需要实现目前的目标，可能的解决方案可能是

INSERT INTO List (CustNo, NoOverDue, OverDue1, OverDue2, OverDue3, OverDue4)
SELECT CustNo
      ,CASE WHEN ddiff < 1 THEN Cost END NoOverDue
      ,CASE WHEN ddiff BETWEEN  1 AND  30 THEN Cost END OverDue1
      ,CASE WHEN ddiff BETWEEN 31 AND  60 THEN Cost END OverDue2
      ,CASE WHEN ddiff BETWEEN 61 AND  90 THEN Cost END OverDue3
      ,CASE WHEN ddiff BETWEEN 91 AND 120 THEN Cost END OverDue4
  FROM 
(
  SELECT t.*, DATEDIFF(DAY, duedate, GETDATE()) ddiff
    FROM TableCost t
   WHERE CONVERT(VARCHAR(8), ListDate, 112) BETWEEN '20130711' AND '20130713'
     AND DATEDIFF(DAY, duedate, GETDATE()) <= 120
) q

这是 SQLFiddle 演示

从日期范围改进插入表格

1 个答案: